1、Physical Design: With a small tripod mount bracket and a removable lens hood to help minimize lens glare and ghosting. The rotatable tripod holder provides optimal balance and allows for quick and easy vertical format shooting during rotation. 2、Lens Type: The 500mm F6.3 telephoto lens adopts a precise achromatic refractor design, which can obtain images with good peak contrast and flare control. You can use this lens in the "M" manual exposure mode. 3、Optical Design: The 500mm F6.3 telephoto lens has 4 sets of 4 optical structures, and multi layer coating can suppress lens spot and ghosting, improve contrast and color authenticity. 4、Accurate Calibration: The manual focusing design is complemented by depth of field and distance calibration, making it easy to use pre focusing technology to provide sharp and clear images. 5、500mm F/6.3 Achromatic Refraction Telephoto Lens: 500mm F/6.3 ultra long prime lens is a good choice for bird and wildlife photography and ultra long distance photography. 6、Compatibility: When used in conjunction with the included T2 PK mount adapter ring, 500mm F6.3 prime telephoto lens is suitable for DSLR camera KA mount lens. 7、Exquisite Workmanship: The 500mm F6.3 prime telephoto lens has alloy body which has a strong texture, exquisite appearance, and exquisite craftsmanship.